Improvement in acid-pumps



F. NICHOLS. g

Acid-Pumps.

` No.136,934, Pafemedmarch18,187s.

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FRANCIS NICHOLS, OE NEW LONDON, coNNEcTicUfr.

IMPROVEMENT IN ACID-PUMPS'.

Specification forming part of Letters Patent No.1 36,934, dated March18,1873.

To all whom it may concern:

Be it known that I, FRANCIS NICHOLS, of New London, in the county of NewLondon and State of Connecticut, have invented a new and ImprovedAcid-Pump, of which the following is a specification:

' My invention consists of a glass acid-pump, which is also convertedinto a siphon by the an ektension tube to the nozzle,

between the valves, the air being compressed in thechamber by 'a hollowcollapsible bulb, and rarelied by expanding into the bulb again. Theapparatus is also useful for measuring the liquids at the same time, byhaving the bulb constructed todeliver a given quantity by eachoperation. The bulb is so contrived with relation to thecompression-chamber of the pump that it is not exposed to destructiveacids. It is designed for corrosive liquids, such as all the strongeracids (except iiuoric); also sensitive liquids, as solutions of nitrateof silver; volatile liquids, as aqua ammonia, chloroform, &c., can behandled without injury to them, and without passing through the bulb. Itis also adapted for drawing wines, liquors, &c., and for general luse inthe chemical laboratory.

Figure l is a sectional elevation of my improved pump and siphon. Fig. 2is a section of a modified plan of connecting the collapsilarged end Eof a nozzle, F, which projects considerably into said bulb A, and has aglass valve-seat, F, ttedin it at the lower end. These glass appliedthem. G represents the glass valves for these valve-seats; they consistof disks .resting'on the top of the seats, and they are prevented fromrising too high by a small stem, H, of glass, extending down through thecentral hole of the seat, and upset or enlarged at the end I, afterbeing'passed through the seat, by heating and iiattenin g them, orwindcemented joint in a hole 1n the disk made wholly or partly thrbughit, as indicated in Fig. 4. K represents a collapsible bulb of Indiarubber for compressing and rarefying the air; itis connected to theglass bulb A by a short metal tube, Ii, which screws into a littleblock, M, of metal or other substance. cemented in a socket in the sideof the base E of the nozzle, and having a hole through it coincidingwith the hole of the tube, and opening into the. chamber N. The nozzleot' the bulb is tted on this tube so as to slide along it, and a hole,O, is made in the tube to be uncovered when the bulb is moved upward toadmit air for destroying the siphonic action for which the pump isadapted, by the application ofthe extension P of the nozzle, bulb isshoved down along the tube over this vent when the pump is to be worked.

I propose in some cases to make the nozzle of glass, and shape it asrepresented in Figs. 2 and 3. An angleband, Q,

together, tube L fit-ted in a hole through the bulb A, with a shoulder,S, on the outside, and a nut, T, on the inside. I will also secure it bya ground or cemented joint, and around this hole I will have anextension or short tube,X, on the inner surface of bulb A, to affordample surface to make a strong joint. This projection will be formed ona stud projecting from the inner 'surface ofthe mold in which the bulb Ais formed, over which the glass will be blown, and afterward cut off atthe inner end to make the opening through, to insure the fitting of thebulb-nozzle in the tube D. I will make the latter tapered, and if Ichoose I will use a groove, Y, instead of hole, so as to let the airescape.

`To operate the pump the bulb is com pressed by hand, by which the airin it is forced into the chamber N, and an equal quantity forced out ofit through the upper valve 5 then the bulb is allowed to ex pand, whichso rareies the air in the chamber N that it fills from below to acertain extent by atmospheric pressure; then theV bulb is collapsedagain, and this time a quantity of the liquid will be forced out throughthe upper valve in case the liquid has fllled the chamber above thelower end of the projection E of the nozzle; otherwise the air willescape andleave the liquid, in case it is heavier than the air. Itis onthat account that the nozzle is extended down into the bulb A. In somecases it will be found desirable to have a check-valve in the lower endof the tube B, particularly in pumping from barrels and other vessels,where it is desirable to frequently shift the pump from one to another.

I propose to use the pump for measuring soda-sirups, for which it isespecially useful. For use as a siphon the apparatus will be veryuseful, on account of the facility with which the siphonic the pump.

action canbe set up by Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. An acidpumpconsisting of the chambered bulb A, valves G, collapsible bulb K, andpipe-connections B F, combined substantially as specified.

2. The arrangement of the bulb K on the tube L to slide over the hole Oand back, substantially as specified.

3. rlhe angle-band Q provided with alip, R, and applied to the parts Aand E for connecting the same, as specified.

4. The nozzle E F projecting downward into the enlarged chamber of thebulb A, below the suction-pipe L, and provided with a downwardly-seatedvalve, as shown and described.

FRANCIS NICHOLS.

Witnesses:

JOHN R. BoLLEs, WM. C. CRUMP.

